cmdline: update to use OVMF

Since now ACRN is using OVMF to launch UOS, it will greatly
simplify setup steps if we could upstream kernel cmdline to RTVM/UOS/SOS
kernel cmdline. We are using below cmdline for validation every day.

Requested-by: "Xie, Nanlin" <nanlin.xie@intel.com>

cmdline-iot-lts2018

@@ -1,16 +1,28 @@
 quiet
+console=hvc0
 console=tty0
-console=ttyS0,115200n8
+console=ttyS0
+consoleblank=0
 cryptomgr.notests
+i915.avail_planes_per_pipe="64 448 8"
+i915.enable_guc=0
+i915.enable_guc_loading=0
+i915.enable_guc_submission=0
+i915.enable_hangcheck=0
 i915.nuclear_pageflip=1
+ignore_loglevel
 init=/usr/lib/systemd/systemd-bootchart
 initcall_debug
 intel_iommu=igfx_off
 kvm-intel.nested=1
+log_buf_len=16M
+maxcpus=2
 no_timer_check
+nohpet
 noreplace-smp
 rcu_nocbs=0-64
 rcupdate.rcu_expedited=1
 rootfstype=ext4,btrfs,xfs
+rootwait
 tsc=reliable
 rw 

cmdline-iot-lts2018-sos

@@ -1,19 +1,26 @@
 quiet
 console=tty0
 console=ttyS0,115200n8
+consoleblank=0
 cryptomgr.notests
+hvlog=2M@0x1FE00000
 i915.avail_planes_per_pipe=0x01010F
 i915.domain_plane_owners=0x011111110000
+i915.enable_guc=0
 i915.enable_gvt=1
 i915.nuclear_pageflip=1
+ignore_loglevel
 init=/usr/lib/systemd/systemd-bootchart
 initcall_debug
 intel_iommu=igfx_off
 kvm-intel.nested=1
+memmap=2M$0x1FE00000
+no_timer_check
 no_timer_check
 noreplace-smp
 rcu_nocbs=0-64
 rcupdate.rcu_expedited=1
 rootfstype=ext4,btrfs,xfs
+rootwait
 tsc=reliable
 rw